九年级unit7第三课时.ppt

Unit7
Teenagers should be allowed to choose their own clothes.
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1wed to get their ears pierced.
Parents should allow teenagers to go out with their friends.
Parents should allow sixteen-year-olds to drive.
Parents should allow fifteen-year-olds to choose their own clothes.
Teenagers should be allowed to go out with their friends.
Sixteen-year-olds should be allowed to drive.
Fifteen-year-olds should be allowed to choose their own clothes.
Grammar Focus
I don’t think sixteen-year-olds should be allowed to drive.
I agree. They aren’t serious enough .
Do you think teenagers should be encouraged to make their own decisions?
No ,I don’t agree with this. Teenagers are too young to make their own decisions.
Teenagers should not be allowed to have part-time jobs. sixteen-year-olds should be allowed to work at night?
I disagree. They can learn a lot from working.
含有情态动词的被动语态:
情态动词 + be + done
情态动词 + not + be +done
语态：表示主语和谓语动词之间的关系。
英语有两种语态，即主动语态和被动语态。
主动语态：表示主语是动作的执行者。被动语态：表示主语是动作的承受者。
如：
Many students study English.(主动语态)
English is studied by many students.
(被动语态)
语态
含有情态动词的被动语态结构：
can/may/must/should + be+过去分词
can take good care of Gina ．
by Amy.
Gina
can be taken good care of
should drink more water.
More water
should be drunk
by you.
should allowed fourteen-year-olds to choose their own clothes.
can’t hear her sing .
3. The lights should be turned off before you leave the classroom.
should put books into the desk.
Fourteen –year-olds should be allowed to choose their own clothes by parents.
Her can’t be heard to sing by me.
You should turnoff before you leave the classroom.
Books should be put into the desk.
exercise
同义句转换
They should allow us to have part-time jobs. ____________________________.
We should allo